EP3063507A1 - Flow meter - Google Patents

Flow meter

Info

Publication number
EP3063507A1
EP3063507A1 EP14828559.6A EP14828559A EP3063507A1 EP 3063507 A1 EP3063507 A1 EP 3063507A1 EP 14828559 A EP14828559 A EP 14828559A EP 3063507 A1 EP3063507 A1 EP 3063507A1
Authority
EP
European Patent Office
Prior art keywords
measuring
measuring chamber
section
core
outlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14828559.6A
Other languages
German (de)
French (fr)
Other versions
EP3063507B1 (en
Inventor
Marcel Leonardus Joseph Petrus Peters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP3063507A1 publication Critical patent/EP3063507A1/en
Application granted granted Critical
Publication of EP3063507B1 publication Critical patent/EP3063507B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/14—Casings, e.g. of special material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/056—Orbital ball flowmeters

Definitions

  • the invention relates to a flow meter comprising:
  • a housing comprised of an inlet section and an outlet section, as well as a widened section located in between and comprised of a guide portion connecting to the inlet section and a measuring portion connecting to the guide portion and the outlet section; helical guide blades located in the guide portion and connected to the housing;
  • a measuring chamber located within the measuring portion, which chamber is bounded on an outside by the measuring portion of the housing, is bounded on the inlet side by the guide blades, is bounded on a running side located opposite to the inlet side by an outlet-section-end-face oriented to the measuring chamber, and is bounded on an inside by an end of the core;
  • the flow meter is installed between two pipe elements and liquid or gas flows via the inlet into the section containing the helical blades, where the liquid is put in rotation and from there into the measuring chamber where a measuring ball is put in rotation and then discharged through the outlet.
  • the rotational speed of the measuring ball is a measure for the flow rate of the fluid.
  • the rotational speed of the measuring ball is preferably measured by means of a light ray which is caused to pass through the transparent housing and detected at an opposite spot.
  • the number of detected interruptions of the light ray forms a measure for the flow rate.
  • a flow meter of this type is known from WO 2008/044917 A.
  • a disadvantage of this known flow meter is that an interior wall provided with openings is located between the core end bounding on the measuring chamber and the outlet- section-end-face oriented to the measuring chamber. This interior wall provides that the measuring ball remains in the measuring chamber and cannot leave the flow meter through the outlet section.
  • the light ray is to be directed through the openings in the interior wall so as to avoid that the interior wall (either transparent or not) disturbs or blocks the light ray.
  • This alignment is to be executed in an accurate manner in view of the small available space and cannot be executed or can be executed with great difficulty as a result of the rotational symmetry of the housing.
  • the flow meter according to the invention is characterized in that between the core end bounding on the measuring chamber and the outlet-section-end-face oriented to the measuring chamber no wall portions are located, and the distance between the outside edge of the core end bounding on the measuring chamber and the inside edge of the outlet-section-end-face oriented to the measuring chamber is smaller than the diameter of the ball.
  • the flow meter according to the invention there are no interior wall portions present within the housing at the location of the measuring chamber that are capable of disturbing a light ray. As a result, the light ray can enter at any desired spot along the periphery and thus does not need tuning.
  • An embodiment of the flow meter according to the invention is characterized in that the guide blades are each provided with an inlet end bounding on the inlet section and an outlet end bounding on the measuring chamber, which outlet end is provided with a recess that has an arched bounding wall, where the maximum distance between the outlet-section- end-face oriented to the measuring chamber and this arched bounding wall is larger than the diameter of the measuring ball and the minimum distance between the outlet- section-end- face oriented to the measuring chamber and this arched bounding wall is smaller than the diameter of the measuring ball.
  • a further embodiment of the flow meter according to the invention is characterized in that the flow meter comprises two parts in addition to the measuring ball, that is to say, a first part comprising the inlet section, the guide portion, the guide blades and the measuring portion, and a second part comprising the outlet section, where the outside edges of the guide blades are attached to the housing and the inside edges of the guide blades are attached to the core, and where the inside diameter of the guide blades is equal to the outside diameter of the core.
  • Figure 1 shows a sectional view of an embodiment of the flow meter according to the invention
  • Figure 2 shows a top plan view of the flow meter shown in Fig. 1;
  • Figure 3 shows a bottom view of the flow meter shown in Fig. 1.
  • Figs. 1 to 3 show an embodiment of the flow meter according to the invention in a sectional view, top plan view and bottom view respectively.
  • the flow meter 1 comprises a housing 3 provided with an inlet section 3 A and an outlet section 3B, as well as a widened section located in between.
  • This widened section comprises a guide portion 3B connecting to the inlet section, and a measuring portion 3C connecting to the guide portion and the outlet section.
  • the guide portion accommodates eight helical guide blades 5 whose outside egdes 5A are attached to the housing. Within these guide blades is present a core 7 which is attached to the inside edges 5B of the lower parts of the guide blades.
  • a measuring ball 13 is located in the measuring chamber.
  • fluid flows through the inlet bounded by the inlet section 3A into the blade portion bounded by the guide portion 3B, in which blade portion the fluid is put in rotation by the helical blades 5.
  • the fluid When leaving the blade portion the fluid directly flows into the measuring chamber 9 bounded by the measuring portion 3C in which measuring chamber the measuring ball 13 is put in rotation. Subsequently, the fluid flows outwards through the outlet bounded by the outlet section 3D.
  • the rotational speed of the measuring ball is a measure for the flow rate of the fluid.
  • Fig. 1 the flow of the fluid is indicated by means of arrows 15.
  • the distance 17 between the outside edge 7B of the core end bounding on the measuring chamber and the inside edge 11B of the end face of the outlet section oriented to the measuring chamber is smaller than the diameter of the measuring ball 13.
  • the guide blades 5 are provided with an inlet end bounding on the inlet and an outlet end bounding on the measuring chamber. This outlet end is provided with a recess that has an arched bounding wall 5C.
  • the maximum distance 19 between the outlet-section-end- face 11 oriented to the measuring chamber and this arched bounding wall 5C is larger than the diameter D of the measuring ball 13 and the minimum distance 21 between the outlet- section-end-face 11 oriented to the measuring chamber and this arched bounding wall 5C is smaller than the diameter D of the measuring ball 13. In consequence, the fluid coming from the guide blades directly flows into the rotation path of the measuring ball.
  • the flow meter 1 is comprised of two parts, that is to say a first part comprised of the inlet section 3 A, the guide portion 3B, the guide blades 5 and the core 7, and a second part comprised of the outlet section 3D.
  • the inside diameter 23 of the guide blades is equal to the outside diameter 25 of the core, so that when injection molding is being executed the bottom die half (in the state of the flow meter shown in Fig. 1 ) for the first part of the flow meter comes loose as a result of distortion.
  • the inlet section 3A and the outlet section 3D both have an equally wide cylindrical opening and are in line.
  • the widened section (formed by the portions 3B and 3C) has a larger diameter than that of the inlet and outlet sections, where the transition from the inlet section to the widened section is not effected abruptly in one step, but gradually by means of a conical wall portion which includes the core 7 that has a conical wall 27 oriented to the inlet, which wall gradually guides the axially directed incoming fluid stream to the guide blades 5.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

A flow meter 1 comprises a housing 3 which accommodates helical guide blades 5 and a core 7 located within the guide blades, and includes a measuring chamber 9 in which a measuring ball 13 can rotate in a circle. Between the end 7A of the core 7 bounding on the measuring chamber 9 and the end face 11 of the outlet section 3D oriented to the measuring chamber there are no wall portions present, and the distance 17 between the outside edge 7B of the core end 7A bounding on the measuring chamber and the inside edge 11B of outlet-section-end-face 11 oriented to the measuring chamber is smaller than the diameter D of the measuring ball 13. As a result, the fluid may unimpedely flow out of the measuring chamber as a result of which there is low flow resistance of the flow meter. Moreover, this causes no obstacles to be present between two oppositely arranged spots on the housing that may disturb a light ray for the measurement.

Description

Flow meter
DESCRIPTION:
Field of the invention
The invention relates to a flow meter comprising:
a housing comprised of an inlet section and an outlet section, as well as a widened section located in between and comprised of a guide portion connecting to the inlet section and a measuring portion connecting to the guide portion and the outlet section; helical guide blades located in the guide portion and connected to the housing;
a core present within the guide blades;
a measuring chamber located within the measuring portion, which chamber is bounded on an outside by the measuring portion of the housing, is bounded on the inlet side by the guide blades, is bounded on a running side located opposite to the inlet side by an outlet-section-end-face oriented to the measuring chamber, and is bounded on an inside by an end of the core;
a measuring ball present in the measuring chamber; and
- an opening present between the core-end bounding on the measuring chamber and the outlet section end face oriented to the measuring chamber.
During operation the flow meter is installed between two pipe elements and liquid or gas flows via the inlet into the section containing the helical blades, where the liquid is put in rotation and from there into the measuring chamber where a measuring ball is put in rotation and then discharged through the outlet. The rotational speed of the measuring ball is a measure for the flow rate of the fluid.
The rotational speed of the measuring ball is preferably measured by means of a light ray which is caused to pass through the transparent housing and detected at an opposite spot. The number of detected interruptions of the light ray (by the ball) forms a measure for the flow rate.
State of the art A flow meter of this type is known from WO 2008/044917 A. A disadvantage of this known flow meter is that an interior wall provided with openings is located between the core end bounding on the measuring chamber and the outlet- section-end-face oriented to the measuring chamber. This interior wall provides that the measuring ball remains in the measuring chamber and cannot leave the flow meter through the outlet section. For measuring the frequency of the interruptions of the light ray shining through the transparent measuring portion of the housing, the light ray is to be directed through the openings in the interior wall so as to avoid that the interior wall (either transparent or not) disturbs or blocks the light ray. This alignment is to be executed in an accurate manner in view of the small available space and cannot be executed or can be executed with great difficulty as a result of the rotational symmetry of the housing.
Summary of the invention It is an object of the invention to provide a flow meter of the type defined in the opening paragraph where the problem mentioned above does not present itself or at any rate to a lesser extent. For this purpose the flow meter according to the invention is characterized in that between the core end bounding on the measuring chamber and the outlet-section-end-face oriented to the measuring chamber no wall portions are located, and the distance between the outside edge of the core end bounding on the measuring chamber and the inside edge of the outlet-section-end-face oriented to the measuring chamber is smaller than the diameter of the ball. In the flow meter according to the invention there are no interior wall portions present within the housing at the location of the measuring chamber that are capable of disturbing a light ray. As a result, the light ray can enter at any desired spot along the periphery and thus does not need tuning.
In addition, a large unimpeded outlet opening is present as a result, so that the flow resistance is lower than when the known flow meter is applied.
An embodiment of the flow meter according to the invention is characterized in that the guide blades are each provided with an inlet end bounding on the inlet section and an outlet end bounding on the measuring chamber, which outlet end is provided with a recess that has an arched bounding wall, where the maximum distance between the outlet-section- end-face oriented to the measuring chamber and this arched bounding wall is larger than the diameter of the measuring ball and the minimum distance between the outlet- section-end- face oriented to the measuring chamber and this arched bounding wall is smaller than the diameter of the measuring ball. As a result, the fluid coming from the guide blades flows even more directly into the rotation path of the measuring ball than in the known flow meter where there is a larger distance between the ball path and the guide blades. In consequence, the measuring accuracy and reproducibility is greater than for the known flow meter.
A further embodiment of the flow meter according to the invention is characterized in that the flow meter comprises two parts in addition to the measuring ball, that is to say, a first part comprising the inlet section, the guide portion, the guide blades and the measuring portion, and a second part comprising the outlet section, where the outside edges of the guide blades are attached to the housing and the inside edges of the guide blades are attached to the core, and where the inside diameter of the guide blades is equal to the outside diameter of the core. The result of this is that the flow meter can be assembled in a simple manner and there are no parts of the guide blades that are located at a smaller radius than that of the outside of the core, so that when injection molding is being executed the lower die half (in the state of the flow meter shown in Fig. 1) of the first part of the flow meter comes loose as a result of distortion.
Brief description of the drawing figures
The invention will be further described below in more detail with reference to an example of embodiment of the flow meter according to the invention represented in the drawing figures, in which:
Figure 1 shows a sectional view of an embodiment of the flow meter according to the invention;
Figure 2 shows a top plan view of the flow meter shown in Fig. 1; and
Figure 3 shows a bottom view of the flow meter shown in Fig. 1.
Detailed description of the drawing figures
Figs. 1 to 3 show an embodiment of the flow meter according to the invention in a sectional view, top plan view and bottom view respectively. The flow meter 1 comprises a housing 3 provided with an inlet section 3 A and an outlet section 3B, as well as a widened section located in between. This widened section comprises a guide portion 3B connecting to the inlet section, and a measuring portion 3C connecting to the guide portion and the outlet section. The guide portion accommodates eight helical guide blades 5 whose outside egdes 5A are attached to the housing. Within these guide blades is present a core 7 which is attached to the inside edges 5B of the lower parts of the guide blades.
Within the measuring portion is accommodated a measuring chamber 9 of which an outside is bounded by the measuring portion 3C of the housing and is bounded on an inlet side by the under sides 5C of the guide blades. On a running side situated opposite to the inlet side the measuring chamber is bounded by a measuring-chamber-oriented end face 11 of the outlet section, and on an inside the measuring chamber is bounded by an end 7A of the core. Between this end 7A bounding on the measuring chamber and the measuring- chamber-oriented end face 1 1 of the outlet section there is an opening forming the outlet opening of the fluid from the measuring chamber. A measuring ball 13 is located in the measuring chamber.
During operation fluid flows through the inlet bounded by the inlet section 3A into the blade portion bounded by the guide portion 3B, in which blade portion the fluid is put in rotation by the helical blades 5. When leaving the blade portion the fluid directly flows into the measuring chamber 9 bounded by the measuring portion 3C in which measuring chamber the measuring ball 13 is put in rotation. Subsequently, the fluid flows outwards through the outlet bounded by the outlet section 3D. The rotational speed of the measuring ball is a measure for the flow rate of the fluid. In Fig. 1 the flow of the fluid is indicated by means of arrows 15.
Between the core end 7A bounding on the measuring chamber and the end face 11 of the outlet section oriented to the measuring chamber there are no wall portions. As a result, the fluid can unimpededly flow from the measuring chamber to the outlet due to which the flow resistance of the flow meter is low. Moreover, no obstacles are found in consequence between two oppositely arranged spots on the housing which obstacles could disturb the light ray for the measurement.
For preventing the measuring ball 13 from leaving the measuring chamber 9, the distance 17 between the outside edge 7B of the core end bounding on the measuring chamber and the inside edge 11B of the end face of the outlet section oriented to the measuring chamber is smaller than the diameter of the measuring ball 13.
The guide blades 5 are provided with an inlet end bounding on the inlet and an outlet end bounding on the measuring chamber. This outlet end is provided with a recess that has an arched bounding wall 5C. The maximum distance 19 between the outlet-section-end- face 11 oriented to the measuring chamber and this arched bounding wall 5C is larger than the diameter D of the measuring ball 13 and the minimum distance 21 between the outlet- section-end-face 11 oriented to the measuring chamber and this arched bounding wall 5C is smaller than the diameter D of the measuring ball 13. In consequence, the fluid coming from the guide blades directly flows into the rotation path of the measuring ball.
Aside from the measuring ball 13 the flow meter 1 is comprised of two parts, that is to say a first part comprised of the inlet section 3 A, the guide portion 3B, the guide blades 5 and the core 7, and a second part comprised of the outlet section 3D. The inside diameter 23 of the guide blades is equal to the outside diameter 25 of the core, so that when injection molding is being executed the bottom die half (in the state of the flow meter shown in Fig. 1 ) for the first part of the flow meter comes loose as a result of distortion.
The inlet section 3A and the outlet section 3D both have an equally wide cylindrical opening and are in line. The widened section (formed by the portions 3B and 3C) has a larger diameter than that of the inlet and outlet sections, where the transition from the inlet section to the widened section is not effected abruptly in one step, but gradually by means of a conical wall portion which includes the core 7 that has a conical wall 27 oriented to the inlet, which wall gradually guides the axially directed incoming fluid stream to the guide blades 5.
Albeit the invention has been elucidated in the foregoing with reference to the drawing figures, it should be set out that the invention is not by any manner or means restricted to the embodiment shown in the drawing figures. The invention also extends to any embodiments deviating from the embodiment shown in the drawing figures within the scope defined by the claims.

Claims

CLAIMS:
1. Flow meter (1) comprising:
a housing (3) comprised of an inlet section (3 A) and an outlet section (3D), as well as a widened section located in between and comprised of a guide portion (3B) connecting to the inlet section and a measuring portion (3E) connecting to the guide portion and the outlet section;
helical guide blades (5) located in the guide portion and connected to the housing; a core (7) present within the guide blades;
a measuring chamber (9) located within the measuring portion, which chamber is bounded on an outside by the measuring portion (3C) of the housing, is bounded on an inlet side by the guide blades (5), is bounded on a running side located opposite to the inlet side by an end face (11) of the outlet section oriented to the measuring chamber, and is bounded on an inside by an end (7 A) of the core;
a measuring ball (13) present in the measuring chamber; and
- an opening present between the core-end (7 A) bounding on the measuring chamber and the outlet- section-end-face (11) oriented to the measuring chamber,
characterized in that between the end (7 A) of the core (7) bounding on the measuring chamber and the end face (11) of the outlet section (3D) oriented to the measuring chamber no wall portions are present, and the distance (17) between the outside edge (7B) of the core end (7A) bounding on the measuring chamber and the inside edge (11B) of the end face (11) of the outlet section oriented to the measuring chamber is smaller than the diameter (D) of the measuring ball (13).
2. Flow meter (1) as claimed in claim 1, characterized in that the guide blades (5) are each provided with an inlet end bounding on the inlet section (3A) and an outlet end bounding on the measuring chamber (9), which outlet end is provided with a recess that has an arched bounding wall (5C), where the maximum distance (19) between the end face (11) of the outlet section (3D) oriented to the measuring chamber and this arched bounding wall (5C) is larger than the diameter (D) of the measuring ball (13), and the minimum distance (21) between the end face (11) of the outlet section (3D) oriented to the measuring chamber and this arched bounding wall (5C) is smaller than the diameter (D) of the measuring ball
(13).
3. Flow meter (1) as claimed in claim 1 or 2, characterized in that aside from the measuring ball (13) the flow meter (1) is comprised of two parts, that is to say, a first part comprised of the inlet section (3A), the guide portion (3B), the guide blades (5) and the measuring portion (3C) and the core (7), and a second part comprised of the outlet section (3D), where the outside edges (5A) of the guide blades (5) are attached to the housing (3) and the inside edges (5B) of the guide blades are attached to the core (7), and where the inside diameter (23) of the guide blades is equal to the outside diameter (25) of the core.
EP14828559.6A 2013-10-29 2014-10-29 Flow meter Active EP3063507B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2011701 2013-10-29
PCT/NL2014/050753 WO2015065187A1 (en) 2013-10-29 2014-10-29 Flow meter

Publications (2)

Publication Number Publication Date
EP3063507A1 true EP3063507A1 (en) 2016-09-07
EP3063507B1 EP3063507B1 (en) 2021-12-08

Family

ID=52394291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14828559.6A Active EP3063507B1 (en) 2013-10-29 2014-10-29 Flow meter

Country Status (4)

Country Link
US (1) US10094693B2 (en)
EP (1) EP3063507B1 (en)
CN (1) CN105874304B (en)
WO (1) WO2015065187A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4279878A1 (en) 2022-05-19 2023-11-22 IMI Hydronic Engineering International SA A device for flow measurement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2017477B1 (en) * 2016-09-16 2018-03-22 Leonardus Josephus Petrus Peters Marcel Detectie-eenheid voor het detecteren van een ronddraaiende meetkogel, alsmede stromingsmeter voorzien van de detectie-eenheid
NL2019555B1 (en) 2016-09-16 2019-10-07 Leonardus Josephus Petrus Peters Marcel Flow meter

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
SE367249B (en) * 1971-11-10 1974-05-20 T Griverus
DE2910387A1 (en) 1979-03-16 1980-09-18 Licentia Gmbh Volumetric flowmeter with ball in toroidal chamber - formed by diaphragm and sealing disc in cylindrical housing
EP0172451B1 (en) 1984-07-31 1990-04-25 Matsushita Electric Industrial Co., Ltd. Flow rate detecting device
JPS62168022A (en) 1986-01-20 1987-07-24 Matsushita Electric Ind Co Ltd Flow rate sensor
US4782707A (en) 1986-11-05 1988-11-08 Matsushita Electric Industrial Co., Ltd. Apparatus for detecting flow amount of fluid in passage
US4819577A (en) * 1988-05-20 1989-04-11 Flow-Rite Controls, Ltd. Fluid flow indicator
DE19927818C2 (en) * 1999-06-18 2003-10-23 Bosch Gmbh Robert Device for measuring the mass of a flowing medium
DE10059421C2 (en) * 2000-11-30 2003-04-10 Bosch Gmbh Robert Device for determining at least one parameter of a flowing medium
DE10246069A1 (en) * 2002-10-02 2004-04-15 Robert Bosch Gmbh Device for determining at least one parameter of a medium flowing in a line
EP2076738A1 (en) 2006-10-10 2009-07-08 Marcel Leonardus Joseph Petrus Peters Orbital ball flowmeter for gas and fluid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4279878A1 (en) 2022-05-19 2023-11-22 IMI Hydronic Engineering International SA A device for flow measurement
WO2023222479A1 (en) 2022-05-19 2023-11-23 Imi Hydronic Engineering International Sa A device for flow measurement

Also Published As

Publication number Publication date
CN105874304A (en) 2016-08-17
EP3063507B1 (en) 2021-12-08
US20160258800A1 (en) 2016-09-08
CN105874304B (en) 2019-03-15
WO2015065187A1 (en) 2015-05-07
US10094693B2 (en) 2018-10-09

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